package com.ddd.config;

import com.ddd.filter.JwtAuthenticationTokenFilter;
import com.ddd.handler.AccessDeniedHandlerImpl;
import com.ddd.handler.AuthenticationEntryPointImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    @Autowired
    private AuthenticationEntryPointImpl authenticationEntryPoint;

    @Autowired
    private AccessDeniedHandlerImpl accessDeniedHandler;

    @Bean
    public PasswordEncoder passwordEncoder(){
        return  new BCryptPasswordEncoder();
    }


    @Override
    protected void configure(HttpSecurity http) throws Exception {
       http
               .csrf().disable()//关闭csrf
               .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS) // 不通过session 获取SecurityContext
               .and()
               .authorizeRequests()
               .antMatchers("/user/login").anonymous()
               .anyRequest().authenticated();

        // 配置过滤器
        http.addFilterBefore(jwtAuthenticationTokenFilter , UsernamePasswordAuthenticationFilter.class);

        // 配置异常处理器
        http.exceptionHandling()
                .authenticationEntryPoint(authenticationEntryPoint)
                .accessDeniedHandler(accessDeniedHandler);

        // 允许跨域
        http.cors();
    }

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
}
